The Phottix Aster PT-V4 Wireless Flash Trigger receiver wirelessly triggers off-camera flashes and studio lights. This receiver attaches to portable flashguns with a hot shoe style mount or via a PC Sync cable and is meant to be used with the Phottix Aster transmitter.
The Phottix Aster receiver offers multiple modes like W (Wireless) Mode and L (Light) Mode. W (Wireless) Mode - The receiver is triggered by a wireless signal from the Phottix Aster transmitter. The receiver should be within 30 m. of the transmitter. L (Light) Mode - The receiver is optically triggered. A camera's pop-up flash, or another flashgun or studio strobe will fire the flash unit connected to the receiver.
The Phottix Aster receiver has 4 wireless channels to avoid radio interference and allows photographers to easily create multiple lighting set-ups.